<html>

<head>
    <script type="text/javascript" src="test.js"></script>
</head>

<body style="text-align:center">
    <br /><br />
    <p>头像</p>
    <img src="head1.png" style="height:128px" />
    
    <br /><br /><br /><br />
    <p>时钟</p>
    <div id="txt_clock"></div>

    <br /><br /><br /><br />
    <p>计时器</p>
    <input type="button" value="开始计时" onClick="timerStart()">
    <input type="text" value="0" id="timer_txt">
</body>

</html>